How to charge the wrist electronic blood pressure monitor?

The electronic blood pressure monitor can be charged by replacing electrons. The electronic sphygmomanometer uses the amplitude measurement principle, which is more accurate, but has many influencing factors. Subjects are generally required to sit quietly for 5-10 minutes, either in a natural lying or sitting position, with the left or right upper arm placed on a table on the same plane as the heart, to evacuate the cuff air. The cuff should be placed about two fingers above the elbow and should be moderately tight, with the length of the cuff inserted into the wrist. During measurement, the arms are required to relax naturally and no movement is allowed.